If it is not an integer

Back to topics list To post a new topic, please log in or register
avatar
32
m_shafiei2006 2016.05.02 02:10
 

HI


How do I write that an variable is (or not) an integer, or my integer variable does not have value ?


avatar
Moderator
3404
GumRai 2016.05.02 02:20 #
 

You declare a variable to what you need it to be

int a;

double b;

string c;

avatar
32
m_shafiei2006 2016.05.02 02:29 #
 

OK, i know


I declare

int N;

and after that as the situation changes I give a value to N, like N = 2 or N = 1 etc,

N can be 0>, 0< or 0.

but before these situations N does not have a value, I need to do something when N still does not have value.

avatar
164
drazen64 2016.05.02 02:44 #
 

Try with NULL: Void Type and NULL Constant 

 

avatar
32
m_shafiei2006 2016.05.02 03:19 #
 
thank you again.
avatar
12985
WHRoeder 2016.05.02 19:17 #
 
It always has a value. If you don't give it one, it is random.
Either give it one, or add a boolean variable that states set or not.

m_shafiei2006:

N can be 0>, 0< or 0.

but before these situations N does not have a value, I need to do something when N still does not have value.

NULL is only for strings and pointers.
drazen64: Try with NULL: Void Type and NULL Constant 
avatar
32
m_shafiei2006 2016.05.04 08:56 #
 
WHRoeder:
It always has a value. If you don't give it one, it is random.
Either give it one, or add a boolean variable that states set or not.

m_shafiei2006:

N can be 0>, 0< or 0.

but before these situations N does not have a value, I need to do something when N still does not have value.

NULL is only for strings and pointers.
drazen64: Try with NULL: Void Type and NULL Constant 
OK, thanks, so I need to use another trick.
Back to topics list  

To add comments, please log in or register